Machine for forming flanges



Jan. 11 1927.

F. GEIGER ET AL MACHINE FOR FORMING FLANGES MW .Mm l 0 61 E 1 mvf m e E 2 *0 W W e w n g. A m Ma 1 2 I 1 i I 1 I 1 I l d 9 lllllllll i e Jan. 11 1927,

F. GEIGER ET AL MACHINE FOR FORMING FLANGES 2 Sheets-Shes? 2 JNVIENTORS firederzck Gee/yer 4 ATTORNEYS C: Swift y George I Filed Feb. 16,

Patented Jan. 11, 1927.

TED ST ATE S ATENT orrica FREDERICK GEIGEB, OFCLEVELAITD, AND GEORGE C. S'WIFT, OF CLEVELAND HEIGHTS, OHIO, ASSIGNOR-S TO THE ENAMEL PRODUCTS COIVI'PANY, 0F CLEVELAND, 01-110, .A.

CORPORATION OF OHIO.

MACHINE FOR FORMING FLANGES.

Application filed February The present invention relates to a machine for forming flanges on sheet metal articles such as table tops, wash-tub covers, dirt trays, broiler pans and the like, which require a rebent, or turned underneath flange around the edge. More particularly the present machine, as shown, is adapted for turning in the rebent flanges of table tops such as are made into enamel table tops and has for its object the foreing of the rebent flanges at the corners of the tops at the same time that the side flanges are formed. In such rebending operation it is necessary to provide against shearingorbreaking the flanges, particularly at the corners where the metal must be smoothly bent.

To the accomplishment of the foregoing and related ends, said invention, then, consists of the means hereinafter fully described and particularly pointed out in the claims,

The annexed drawing and the following description set forth in detail certain mechanism embodying the invention, such disclosed means constituting, however, but one of various mechanical forms in which the principle of the invention maybe used.

In said. annexed drawing Fig. 1 is a top plan view of the machine; Fig. 2 is a central vertical longitudinal section taken'on the line 22 of Fig. 1; Fig. 3 is a transverse sectional view taken on the line 3-3 of Fig. 1; Fig. a is a section of a portion of the device shown in ig. '2 but showing the forming members in their closed position; Fig. 5 is a section on the line 55 of Fig. 1; and Fig. 6 is a plan view of the pusher plate.

The machine comprises a base formed of two main side rails 1 connected together by means of a bed plate 2. At the right hand end of the machine as seen in Figs. 1 and 2. there is mounted in bearings 4: the main driving or power shaft 5 which, as shown, has tight and loose pulleys 6 and 7 thereon. Near one end there is mounted a small spur gear 8 in mesh with a large gear 9 mounted on a second or driven shaft 10 carriedin bearings 11 on the side rails. This shaft isprovided on each end with a driving wheel 12 having crank pins 13 thereon. These pins have cranks or connecting rods 1d mounted thereon and connected at their 16, 1925. Serial No. 9,538.

vature which it is desired to give the table corner. This die member is stationary and,

is spaced above the bed plate and has its forward edge curved or rounded off as at 28 so as to bend and form the desired flange and not shearthe same.

Between the stationary die and the bed plate is mounted a pusher plate or extractor 29 roughly Y-shaped as best-shownin Fig. 6 and having its tongue orleg 30 extending rearwardly and terminating at the edge of a 'slot31 in the bed. This pusher plate is normally in the position indicated in Fig. 2 and is resiliently held there by means of a rocker arm 83 mounted on a crossshaft 34 carried in the-siderailsand normally rocked by means of springs 35 connected to theside rails andto arms 36 depending from the rock shaft.

The moving die or forming membercomprises a V-shaped die member 40 carried by an extending arm 41 connected to the cross head by means of the bolts 42 so as to be movable therewith. The .V-shaped member is removably attachedtothe tongue by bolts or screws 43 or the like and may be changed for different size tabletops. In operating the machine, the operator places a table top 27, or other article to beformed, which has previously been formed with a flange 51 around its edge bent at an angle to the plane of the top underneath and snugly against the movable diememberAO with the flange extending upwardly and with a corner of the top at the point of the die member. As the cross head moves, drawing the die member 40 to the right, the table top flange 51 is first moved against the pusher plate or extractor 29'and then with the latter underneath the stationary member 25 with the curved face until it reaches the position-shown in Fig. 4 at which time the upper portion of the flange 51 is rebent inwardly of the table top and parallel thereto. This movement forces the pusher plate 29 back and rotates the rock shaft 3% to the position shown in Fig. 4:. When the moving die 40 is retracted to its normal position shown in Fig. 2, the pusher plate 29 is moved out by the action of the springs 35 and the table top is thus forced out from under the stationary die.

The dies for a table top, such as is illustrated in the drawings, are of such a size as to form the corner and sli htly more than one half of each side adjacent the corner. As soon as the die is retracted and the table top freed from the stationary die, the oper ator shifts the top presenting the next corner to the movable die and the operation is repeated. Each top is thus formed four times, one for each corner and when thus formed is completed with an inwardly bent flange 55 around its entire edge and is made ready for the enamelling or finishing operations.

The length of the sides of the die members will be varied to suit the size of table tops or other articles being operated upon. As the operator merely has to turn and remove. and position the articles the forming may proceed rapidly. The curved stationary die bends the flange 55 gradually both at the corner and along the sides and does not break or shear the same, thus eliminating this par ticular difliculty, particularly at the corner proper which is slightly rounded and in which the entire metal must be reformed slightly during the bending operation. The dies are removably mounted so that dies for various sizes or different articles may be inserted in the machine, it being understood that any regular sided article, such as a boiler pan, washer cover or the like, may be formed as readily as a table top such as has been illustrated. In rounded or circular objects the two dies will be of a size to finish up to a half top, as in the case of a circular article, or if the article is irregular in shape, a p-ortion of the flanging may be done and then the dies changed for the rest of the flanging operation.

Other modes of applying the principle of our invention may be employed instead of the one explained, change being made as regards the mechanism herein disclosed, provided the means stated by any of the follow ing claims or the equivalent of such stated means be employed.

We therefore particularly point out and distinctly claim as our invention 1. In a rebent flange forming machine, the combination of a base, a movable slide thereon, a stationary die member removabl mounted on said base, said member bein shaped to fit a predetermined portion of the edge of the article to be formed, a complementary shaped die member slidably and removably mounted on said base and adapted to be operatively connected to said movable slide, said member being adapted to receive a partially formed article having a flange and to move such article under said stationary die member to form a rebent flange thereon over a predetermined edge extent and guide means on said stationary die for maintaining the slidable complementary die in alignment. 7

In a rebent flange forming machine, the con'ibination of a base, a movable slide thereon, a stationary die member removably mounted on said base, said member being shaped to fit a predetermined portion of the edge of the article to be formed, a complementary shaped (lie member slidably and removably mounted on said base and adapted to be operatively connected to said movable slide, said member being adapted to receive a partially formed article having a flange and to move such article under said stationary die member to form a rebent flange thereon over a predetermined edge extent, a guide on said stationary die for maintaining the slidable complementary die in alignment, and extractor means movably mounted on said base under said stationary die member for ejecting the article after the forming operation.

In a rebent flange forming machine, the combination of a base, a movable slide thereon, a stationary die member removably mounted on said base, said member being adapted to fit a predetermined portion of the edge of the article to be formed, a com plen'ientary shaped die member slidably and removably mounted on said base and adapted to be opcratively connected to said movable slide, said member being adapted to receive a partially formed article having a flange and to move such article under said stationary die member to form a rebent flange thereon over a predetermined edge extent, a guide on said stationary die for maintaining the slidable complementaryjdie in alignment, and an extractor plate movably mounted on said base under said stationary die member and normally resiliently held in article ejecting position but being adapted to move with said movable die member during the forming operation.

In a rebent flange forming machine, the combination of a base, a movable slide thereon, a stationary die member removably mounted on said base, said member being adapted to fit a predetermined portion of the edge of the article to be formed, said 'ien'iber having its lower edge curved to produce a beveling action without shearing, a guide on said stationary die, an arm extending from the aforesaid slide through said guide, a complementary shaped die member removably mounted on said arm connected to said movable slide, said member being adapted to receive a partially formed article having a flange and to move such article under said stationary die member to form a rebent flange thereon over a predetermined extent, and extractor means movably mounted on said base under said stationary die mem ber for ejecting the article after the forming operation.

5. In a rebent flange forming machine, the combination of a base, a movable slide thereon, a stationary die member of V-shape mounted on said base and spaced above the same, a guide on said stationary die, an. arm extending from the aforesaid slide through said guide, and a complementary V-shaped die member movably mounted on said arm connected to said movable slide, said movable die member being adapt-ed to receive a partially formed rectangular article and to move the same under said stationary die to form a rebent flange thereon at the corner on approximately one half 01 each adjacent side.

6. In a rebent flange forming machine, the combination of a base, a movable slide thereon, a stationary die member of ll-shape mounted on said base and spaced above the same, a guide on such stationary die, an arm extending from said slide through the said guide, a complementary V-shaped die member removably mounted on said arm connected to said movable slide, said movable die member being adapted to receive a partially formed rectangular article and to move the same under said stationary die to form a rebent flange thereon at the corner on approximately one half of each adjacent side, and an extractor plate movably mounted on said base under said stationary die member and adapted to eject the formed article from said stationary die upon retraction of said movable die.

7. In a rebent flange forming machine, the combination of a base, a movable slide thereon, a stationary die member of V-shape mounted on said base and spaced above the same, a complementary V-shaped die member movably mounted on said base and connected to said movable slide, said movable die memberbeing adapted to receive a partially formed rectangular article and to move the same under said stationary die to form a rebent flange thereon at the corner on approximately one half or" each adjacent side, an extractor plate. movably mounted on said base under said stationary die member and adapted to eject the formed article from said stationary die upon retraction of said movable die, and a spring actuated rock shaft and rocker arm in contact With said extractor plate and adapted to return said plate to its normal table top ejecting position.

8. In a rebent flange forming machine, the combination of a base, a movable slide thereon, a stationary die member of V-shape mounted on said base and spaced above the same, said member having its lower top contacting edge rounded off to bend the flange Without shearing action, a guide on said stationarydie, an arm extending from said lidc through the said guide, and a complementary V-shaped die member removably mounted on said arm connected to said movable slide, said movable die member being adapted to receive a partially formed rectangular article and to move the same under said stationary die to form a rebent flange thereon at the corner on appronlmately one half of each adjacent side.

9. In a rebent flange forming machine, the combination of a base, a movable slide thereon, a stationary die member of V- shape mounted on said base and spaced above the same, said member having its lower top contacting edge rounded off to bend the flange Without shearing action, a complementary V-shaped die member movably mounted on said base and connected to said movable slide, said movable die member being adapted to receive a partially formed rectangular article and to move the same under said stationary die to form a rebent flange thereon at the corner on approximately one half of each adjacent side, an extractor plate movably mounted on said base under said stationary die member and adapted to eject the formed article from said stationary die upon retraction of said movable die, and a spring actuated rock shaft and rocker arm in contact with said extractor plate and adapted to return said plate to its normal table top ejecting position.

10. In a table top forming machine, the combination of a base, a power shaft 1nount ed therein, a cross head slidably mounted on said base, driving connections from said power shaft to said cross head adapted to reciprocate the latter, a stationary die member of V-shape having a rounded angle secured on said base and spaced above the same, a guide on said stationary die, an arm extending from said crosshcad through the said guide, an extractor plat-e of V-shape slidably mounted on said base under said stationary die member, resilient means for normally holding and returning said ext-ractor plate to its table top ejecting position, and a movable die member of V-shape mounted on said arm connected to said cross head to be reciprocated thereby, said movable die member being adapted to receive a partially formed table top and move the same under said stationary die to form a rebent flange at the corner and along approximately one-half of each adjacent side.

11. In a table top forming machine, the combination out a base, apower shaft mounted therein, a cross head slidably mounted on said base, driving connections from said power shaft to said cross head adapted to reciprocate the latter, a stationary die member of V-sha-pe having a rounded angle secure-d on said base and spaced above the same, said die member having a curved lower edge to bend the table top flange Without shearing, a guide on said stationary die, an arm extending from said crosshead 3 through the said guide, an extractor plate of V-shape slidably mounted on said base under said stationary die member, a spring actuated rocking arm for normally holding and returning said extractor plate to its table top ejecting position, and a movable die member of V-shape mounted on said arm connected to said cross head to be reciprocated thereby, said movable die member being adapted to receive a partially formed table top and move the same under said stationary die to form a rebentflange at the corner and along approximately one half of each adjacent side.

Signed by us, this 6 day of Feb, 1925.

FREDERICK GEIGER. GEORGE G. SWIFT. 

